Baked Portabella Mushrooms - cooking recipe

Ingredients

4 portabella mushrooms
1 cup balsamic vinegar
1 cup olive oil

Preparation

Combine ingredients in a large container.
Let marinate for 30 minutes to an hour.
Preheat oven to 350\u00b0F.
Pour the entire contents into a large baking dish, and bake for 25 minutes.
Turn at least once.